Geoff
Hi-poster
Posts: 170
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Post by Geoff on Mar 13, 2014 23:12:15 GMT
Talking about curves and turning heads! Like Ben, I was surprised when i couldn't find any advice on how to turn the curve on my brass smokebox door. Eventually I just bit the bullet and did it by hand with a fairly large radius tool and filed the finish profile in the lathe. It was very scary to start with (I'm scared all the time doing this hobby), but a couple of drinks settled my hands. It took a bit longer but I'm satisfied with the result. Now for my buffer heads! Geoff
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uuu
Elder Statesman
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Posts: 2,815
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Post by uuu on Mar 14, 2014 7:10:05 GMT
-------------------------------------So the tool would be in the empty section of the tool holder on the immediate lower, right ?? and describes an arc as the cross-slide is moved ?? Yes, that's it.
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Post by ejparrott on Mar 14, 2014 7:32:23 GMT
CNC programming the curves on buffer heads is dead easy, just needs the correct use of G01, G02 and G03 in a G71 cycle. Agreed if it's a simple curve, but I doubt if it is. It is.
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Post by davebreeze on Mar 15, 2014 23:42:46 GMT
Dave, the real LSWR B4s have curved heads, I know No. 96 Normandy very well indeed Thanks Ben, looking at my photos I see Normandy's do seem to have a slight curve. However, Granville's do not - I've been all over it and taken loads of photos.
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